Like Mike says, "Helicopter tape" works a treat and means you still get to see the paint finish rather than some black rubbery thing, really good to avaoid cable rub too.
Not the cheapest of vinyl's, mainly because its a 3M product, it's the same stuff they use for stone chip guards of Porsches, can do you an A4 sheet for £5.00 inc uk delivery ~ PM me if you want some